Hi,
When deploying ZFS in cluster environment it would be nice to be able
to have some SSDs as local drives (not on SAN) and when pool switches
over to the other node zfs would pick up the node's local disk drives as
L2ARC.
To better clarify what I mean lets assume there is a 2-node cluster with
1sx 2540 disk array.
Now lets put 4x SSDs in each node (as internal/local drives). Now lets
assume one zfs pool would be created on top of a lun exported from 2540.
Now 4x local SSDs could be added as L2ARC but because they are not
visible on a 2nd node when cluster does failover it should be able to
pick up the ssd's which are local to the other node.
L2ARC doesn't contain any data which is critical to pool so it doesn't
have to be shared between node. SLOG would be a whole different story
and generally it wouldn't be possible. But L2ARC should be.
--
Robert Milkowski
http://milek.blogspot.com
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